How fast does Stage 1B adenocarcinoma with the KRAS G12C mutation grow without treatment?
This is a really important question, and the honest answer is: it varies, but here's what we know.
Adenocarcinoma is generally one of the slower-growing lung cancer types. Studies suggest its median volume doubling time is around 261 Show Full Answer
How fast does Stage 1B adenocarcinoma with the KRAS G12C mutation grow without treatment?
This is a really important question, and the honest answer is: it varies, but here's what we know.
Adenocarcinoma is generally one of the slower-growing lung cancer types. Studies suggest its median volume doubling time is around 261 days — meaning it can take roughly 9 months for the tumor to double in size. However, having the KRAS G12C mutation is an important factor. This mutation essentially keeps the "grow and divide" signal switched on continuously in cancer cells, rather than cycling on and off as it normally should. This can make the cancer behave more aggressively than typical adenocarcinoma.
The KRAS G12C mutation is also associated with worse survival rates compared to other lung cancer types. The key takeaway is that once lung cancer forms, it tends to grow quickly regardless of type. Starting treatment as soon as possible is strongly recommended.
The good news is that there are targeted therapies specifically approved for the KRAS G12C mutation, such as adagrasib (Krazati) and sotorasib (Lumakras), which can help block cancer cell growth. Discussing these options with your oncologist as soon as possible would be really worthwhile.
June 8
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